These regional centres play a major role in the Development Guide Plan released by the Urban Redevelopment Authority, of which the Housing Development Board coordinates its construction projects and services with. Regional centres are meant to decentralise the functions and services of Singapore's Central Area, helping to alleviate congestion there and to bring the workplace closer to peoples' homes. Regional centres primarily serve at least 800,000 people in each region, with people from other regions as a secondary concern. These regional centres contain a collection of shopping malls, hawker centres, and other forms of commercial facilities.